So just like 1000s of others I imagine, Windows 10 violated my C655. I believe it successfully wiped out any trace of Windows 7 for recovery. I even tried a disk I made with the same laptop a year or so ago. It tells me that it doesn't match the hardware. Nice. Tried the "0" at boot to refresh but I get an error code. Command Prompt pimp trying sfcconfig and diskpart. Nada. Zip. Last resort is to erase the hard disk, which may fail also. Will that be an even bigger pile of "ish" to deal with? Opening up a can of worms quite possibly? Will I be able to use my Win7 key located at the Windows sticker on the bottom of this brick? Any advice will be appreciated. Thanks.